MAX4172 Maxim, MAX4172 Datasheet - Page 8

• Manufacturer Part Number: MAX4172
• Description: The MAX4172 is a low-cost, precision, high-side current-sense amplifier for portable PCs, telephones, and other systems where battery/DC power-line monitoring is critical
• Manufacturer: Maxim

Low-Cost, Precision, High-Side
Current-Sense Amplifier
In most applications, grounding the MAX4172 requires
no special precautions. However, in high-current sys-
tems, large voltage drops can develop across the
ground plane, which can add to or subtract from V
Use a single-point star ground for the highest current-
measurement accuracy.
The MAX4172 requires no special bypassing and
responds quickly to transient changes in line current. If
the noise at OUT caused by these transients is a prob-
lem, you can place a 1µF capacitor at the OUT pin to
ground. You can also place a large capacitor at the RS
terminal (or load side of the MAX4172) to decouple the
load, reducing the current transients. These capacitors
are not required for MAX4172 operation or stability. The
RS+ and RS- inputs can be filtered by placing a capac-
itor (e.g., 1µF) between them to average the sensed
current.
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
8
_______________________________________________________________________________________
Power-Supply Bypassing and Grounding
PACKAGE TYPE
µMAX
SO
PACKAGE CODE
U8+1
S8+4
OUT
.
SUBSTRATE CONNECTED TO GND
___________________Chip Information
OUTLINE NO.
21-0042
21-0036
Package Information
PATTERN NO.
90-0096
90-0092
LAND